What is 9x - 3(4x+8)?

Triangle abc is reflected over the line y=x triangle abc has points (-6,-,-1) and (-5,-6) what is the c coordinate

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement